Fluxes of Dissolved Mineral Elements Through a Forest Ecosystem Submitted to Extremely High Atmospheric Pollution Inputs (Czech Republic)

1993

S. 147-157

21 Lit. Ang.

Unselbständiges Werk

200041400

Fluxes of dissolved mineral elements have been monitored in a declining spruce stand in nothern Bohemia. This area is subjected to very high atmospheric pollution. Mean annual throughfall pH was 3.15 and monthly mean values as low as 2.6 were recorded. Measurements show deposition values per ha and per year as high as 150kg S, 60kg Ca and 12kg Al as well as a proton input > 5 keq/ha/yr H+. Part of the input was immobilized in the litter layer and the remaining acid load was buffered by Al release in the mineral horizons. High nutrient inputs may explain why no mineral deficiencies have been detected, although tree mortality is extremely high in this area.